I have an msi gaming trio 4090 it only uses 3x8pin so only 450w I’m getting two 16 pin 600w cables for my PSU just in case soon. Currently using a 12700k but soon it’s gonna be a 13900k. I just plan on leaving the 13900k at stock. I’ve only ever seen my system currently not go past 600w and all I do is gaming and it’s hooked up to a 1000w sine wave UPS. My PSU is a seasonic GX 1000w gold psu which I know can power what I’m gonna have but with all the adapter stuff and the cpu upgrade I was thinking. The only ATX 3.0 PSU you can order right now is the MSI 1000w one. Do I absolutely need one right or am I ok to wait until more manufactures release theirs later. I like the looks of the seasonic Vertex series.